原发性肝癌比较重要的症状是（）.

A.寒战高热

B.肝区疼痛

C.消瘦，贫血，黄疸，腹腔积液

D.肝区肿块

E.消化道出血

Yon' d better _____ your diet rather than eat the same things all the time.[ ]

A. vary  

B. changed

C. convert  

D. altered